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A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. We receive a radio pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. The pulsar in the Crab nebula has a period of rotation of T = 0.033 s that is increasing at the rate of 1.26 x 10^-5 sec/year.
(a) What is the pulsar’s angular acceleration?(b) If the angular acceleration is constant, how many years from now will the pulsar stop rotating?(c) The pulsar originated in a supernova explosion seen in the year 1054. Assuming constant angular acceleration, find the initial T.
A 1.7kg block oscillates on a spring with spring constant 16N/m . At t = 0 s the block is 20 cm to the right of the equilibrium position, obtain the period of the oscillation.
A student bikes to school by traveling first = 1.10 north, then = 0.300 west, and finally = 0.100 south. what distance would the bird cover
What is the total negative charge, in coulombs, of all the electrons in a small 1.05g sphere of carbon? One mole of C is 12.0g, and each atom contains 6 protons and 6 electrons.
Two protons are located on the x-axis at 1.0m and on the y-axis at 1.5m. Determine the electric potential energy of a third proton located at the origin
A certain star is 9.80 light-years away. What is the distance traveled according to observers on the spacecraft
A fire truck attaches two fire hoses to a hydrant to fight a fire. each hose has a diameter of 20 cm. How many kilograms of water are put on the fire in 30 minutes
A loudspeaker at a rock concert generates 10-2 W/m2 at 22.0 m at a frequency of 1.0 kHz. Assume that the speaker spreads its energy uniformly in three dimensions. What is the total acoustic power output of the speaker
Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. If the laser light wavelength is 1062 nm, How many wavelengths are found within the laser pulse
Unpolarized white light is incident on a po- larizer and then falls on an analyzer whose TA makes an angle of %u03B8 = 33.8%u25E6 with the polarizer, What is the fraction of the original light transmitted through both the polarizer and analyzer
A large group of football fans comes to the game with colored cards that spell out the name of their team when held up simultaneously. Most of the cards are colored blue, find the maximum diameter (in mm) of the spectator's pupils
A solid uniform brick is placed on a sheet of wood. When one end of the sheet is raised , What is the width w of the brick
An electron experiences the greatest force as it travels 1.02*10^6 m/s in a magnetic field when it is moving horizontally. The force is upward and of magnitude 1.75*10^-12 N. What is the magnitude of the magnetic field?
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